(a)
Interpretation:
The amount of heat lost by the water is to be calculated.
Concept Introduction : The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.
Mathematically it is represented by
(a)
Answer to Problem 87A
The amount of heat lost by water is
Explanation of Solution
The given values are
Now put all the given values, we get
As heat is negative, it means heat has been lost.
(b)
Interpretation:
The amount of heat absorbed by the refrigerator is to be calculated.
Concept Introduction : As we know that the principle of calorimetry indicates the law of conservation energy which means the total heat lost by the hot body is equal to the total heat gained by the cold body.
(b)
Answer to Problem 87A
The amount of heat absorbed by the refrigerator is
Explanation of Solution
The heat absorbed by the refrigerator will be the same as that of heat released by the water as the heat remains conserved.
(c)
Interpretation:
The assumptions made during the calculations are to be described.
Concept Introduction : The basis of calorimetry is an assumption that the energy gained or lost by the surroundings is equal to the energy lost or gained by the system.
(c)
Answer to Problem 87A
The assumption is that heat is not exchanged between the refrigerator and the surroundings.
Explanation of Solution
As heat released by the water is equal to the heat absorbed by refrigerator, it means there has been no loss of heat to the surroundings
Chapter 17 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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